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What is nucleus of an atom ? Compare its...

What is nucleus of an atom ? Compare its size with that of the atom. Name its constitutents. How is the number of these constituents determined by the atomic number and mass number of the atom ?

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ICSE-RADIOACTIVITY-EXERCISE-12(A)
  1. Name the three constituents of an atom and state mass and charge of ea...

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  2. Define the following terms : (a) atomic number, and (b) mass number.

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  3. What is nucleus of an atom ? Compare its size with that of the atom. N...

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  4. State the atomic number and mass number of ""(11)^(23) Na and draw it...

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  5. What are isotopes ? Give one example.

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  6. (i) What are isobars? (ii) Give one example of isobars.

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  7. What is the name given to elements with same mass number and different...

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  8. Name the atoms of a substance having same atomic number, but different...

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  9. What is meant by Radioactivity ?

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  10. A radioactive substance is oxidised. What changes would you expect to ...

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  11. A radioactive source emits three type of radiations. (a) Name the th...

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  12. Answer the following questions. (a) Name the radiation of zero mass....

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  13. The diagram in Fig. shows a radioactive source S placed in a thick lea...

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  14. Fig. 12.8 shows a mixed source R of alpha and beta particles in a thic...

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  15. Explain why alpha and beta particles are deflected in an electric or a...

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  16. Explain why alpha and beta particles are deflected in an electric or a...

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  17. State following four properties each of alpha, beta and gamma radiatio...

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  18. Compare the ionising power of alpha, beta and gamma radiations.

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  19. State the speed of each of alpha, beta and gamma radiations.

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  20. (a) What is the composition of alpha, beta and gamma radiations? (b) C...

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